import { mkdtempSync, readFileSync, readdirSync, rmSync, statSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { build } from "vite";
import { describe, expect, test } from "vitest";

describe("production mock graph", () => {
  test("excludes the browser mock module from the production bundle", async () => {
    // Given
    const outDir = mkdtempSync(join(tmpdir(), "ai-character-admin-prod-"));
    const previousNodeEnv = process.env.NODE_ENV;

    try {
      process.env.NODE_ENV = "production";

      // When
      await build({
        build: { emptyOutDir: true, outDir },
        configFile: "vite.config.ts",
        logLevel: "silent",
        mode: "production",
      });
      const outputFiles = collectFiles(outDir);
      const output = outputFiles
        .filter((filePath) => filePath.endsWith(".js"))
        .map((filePath) => readFileSync(filePath, "utf8"))
        .join("\n");

      // Then
      expect(outputFiles.some((filePath) => filePath.endsWith("mockServiceWorker.js"))).toBe(false);
      expect(output).not.toContain("mockServiceWorker.js");
      expect(output).not.toContain("startMockWorker");
    } finally {
      process.env.NODE_ENV = previousNodeEnv;
      rmSync(outDir, { force: true, recursive: true });
    }
  });
});

function collectFiles(directory: string): readonly string[] {
  return readdirSync(directory).flatMap((entry) => {
    const path = join(directory, entry);

    return statSync(path).isDirectory() ? collectFiles(path) : [path];
  });
}